67 citations · 267 across the 11 of their papers we have counts for
6 papers · 2 filters
Finite density non-linear sigma model and low energy physics
Falk Bruckmann, Christof Gattringer, Thomas Kloiber +1
We present lattice results for simulations of the non-linear sigma model at finite chemical potential. The complex action problem is overcome by a dual variable representati…
Dual representation for massless fermions with chemical potential and U(1) gauge fields
Christof Gattringer, Thomas Kloiber, Vasily Sazonov
Complex action problems coming from either a chemical potential or a topological term have been solved for several models in recent years by mapping them to so-called dual degrees…
Grand canonical ensemble, multi-particle wave functions, scattering data, and lattice field theories
Falk Bruckmann, Christof Gattringer, Thomas Kloiber +1
We show that information about scattering data of a quantum field theory can be obtained from studying the system at finite density and low temperatures. In particular we consider…
Dual simulation of the 2-dimensional lattice U(1) gauge-Higgs model with a topological term
Christof Gattringer, Thomas Kloiber, Michael Müller-Preussker
The 2-dimensional U(1) gauge-Higgs model with a topological term is a simple example of a lattice field theory where the complex action problem comes from the topological term. We…
Dual lattice representations for O(N) and CP(N-1) models with a chemical potential
Falk Bruckmann, Christof Gattringer, Thomas Kloiber +1
We derive dual representations for O(N) and CP(N-1) models on the lattice. In terms of the dual variables the partition sums have only real and positive contributions also at finit…
Solving the sign problems of the massless lattice Schwinger model with a dual formulation
Christof Gattringer, Thomas Kloiber, Vasily Sazonov
We derive an exact representation of the massless Schwinger model on the lattice in terms of dual variables which are configurations of loops, dimers and plaquette occupation numbe…